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Home >> Cadillac >> 2005 >> STS 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 4.6L (LH2) (2 Of 6)) >> On-Vehicle Repair Instructions - Part 1 >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Fuel Injector Sight Shield
    GM1201072Courtesy of GENERAL MOTORS CORP.
  1. Remove the cross car brace. Refer to Brace Replacement - Cross Vehicle in Body Front End.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
    3. Fig 2: View Of PCV Dirty Air Breather Tube
    GM928153Courtesy of GENERAL MOTORS CORP.
  3. Remove the PCV dirty air tube from the camshaft cover. Refer to Crankcase Ventilation Hoses/Pipes Replacement .
    4. Fig 3: View Of PCV Fresh Air Tube
    GM928145Courtesy of GENERAL MOTORS CORP.
  4. Remove the PCV fresh air tube. Refer to Crankcase Ventilation Hoses/Pipes Replacement .
    5. Fig 4: View Of Sight Shield Bracket
    GM928160Courtesy of GENERAL MOTORS CORP.
  5. Remove the sight shield bracket nuts.
  6. Remove the sight shield bracket.
    7. Fig 5: View Of Left Side Fuel Injectors & Electrical Connectors
    GM887913Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the left side fuel injector electrical connectors (1) from the fuel injectors (2).
    8. Fig 6: View Of Right Side Fuel Injectors & Electrical Connectors
    GM887914Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the right side fuel injector electrical connectors (1) from the fuel injectors (2).
    9. Fig 7: View Of EVAP Emissions Purge Valve Line & Electrical Connector
    GM1239219Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the evaporative emissions purge valve line (2) and electrical connector (1).
    10. Fig 8: View Of Hose Retainers
    GM1235105Courtesy of GENERAL MOTORS CORP.
  10. Remove the EVAP line from the retaining feature (2) at the rear of the right head. Position the line aside.
  11. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure in Engine Controls - 4.6L (LH2).
    12. Fig 9: View Of Fuel Line-To-Fuel Rail Connection
    GM1234881Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the fuel line from the fuel rail (1). Refer to Quick Connect Fitting(s) Service (Metal Collar) or Quick Connect Fitting(s) Service (Plastic Collar) in Engine Controls - 4.6L (LH2).
  13. Remove the fuel line from the retainer at the rear of the right head.
    14. Fig 10: View Of Fuel Rail-To-Intake Manifold Fasteners
    GM948135Courtesy of GENERAL MOTORS CORP.
  14. Remove the fasteners attaching the fuel rail to the intake manifold.
    15. Fig 11: View Of Fuel Rail & Injector Assembly
    GM1234883Courtesy of GENERAL MOTORS CORP.
  15. Lift the entire fuel rail and injector assembly from the intake manifold.
    16. Fig 12: Locating Plenum Duct Clamp
    GM1234875Courtesy of GENERAL MOTORS CORP.
  16. Loosen the plenum duct clamp (1) at the front of the intake manifold.
    17. Fig 13: View Of Intake Manifold & Bolts
    GM928175Courtesy of GENERAL MOTORS CORP.
  17. Loosen the bolts attaching the intake manifold to the cylinder heads.
  18. Remove the intake manifold by using an upward lifting motion at the rear of the manifold assembly.
  19. Inspect the intake manifold. Refer to Intake Manifold Cleaning and Inspection .
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